<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .father>p {
            color: red;
        }
    </style>
</head>

<body>
    <!-- 需求：只让小可爱变红（不能改变html结构） -->
    <!-- 解决：在.father这个div的子代中找p标签 -->
    <div class="father">
        <p>张三</p>
        <div>
            <p>张三的弟弟</p>
        </div>
    </div>
    <p>大可爱</p>
</body>

</html>